Full Description

Note: Nothing in this standard supercedes applicable laws and regulations.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose/Material Description.

This specification defines the requirements of continuous cast Micro-Cellular polyurethane materials based on polyether or polyester chemistry to be used as cushioning, air, dust, light, and water seals or gaskets. These materials may also be used as isolators, rattle protection, covers for gaps and other suitable applications. These materials are typically die cut or slit-to-width from rolls of cast material and may have pressure sensitive adhesive applied to one (1) side.

• For molded, cast, and slab polyurethane foam for sound absorbing applications refer to GMW14196: Polyurethane Foams for Acoustic Applications.

• For elastomer polyurethane foams for sealing and vibration handling applications having a minimum of 15% bio-renewable and a minimum of 25% post automotive shredder residue, refer to GMW16515: Flexible Expanded Material for Air, Dust, Water Sealing and Noise Vibration Handling Applications.

• For slab/sheet polyurethane foam for Engine Compartment Sound Absorber (ESCA), refer to GMW16869.

Material Description.

Materials meeting the requirements in this specification will be comprised of three (3) classes and several types.

Classes.

• Class I:

Micro-Cellular polyurethane materials to be used for air, dust and light seals or rattle isolators.

• Class II:

Micro-Cellular polyurethane materials to be used for water sealing and shall meet the water sealability requirements of this document at 50% compression.

• Class III:

Micro-Cellular polyurethane materials to be used for cell cushioning in battery applications.

Class II materials may also be used in applications where water sealing is not required (i.e., Class II materials may be used in Class I applications).

Material type will be determined according to the range of compression deflection at 25% compression.

Certain applications may require the use of an adhesive. If an adhesive is required, the adhesive backed material shall meet the specified engineering requirements (eSOR, Math data, drawing).

Symbols.

Not applicable.

Applicability.

Typical applications include air, dust, and light seals, water seals and gaskets, isolators, and rattle protection, covers for gaps, topers, and other suitable applications.

Recycled or Alternate Materials.

Recycled polyurethane materials or bio-based materials may be used for parts under this specification.

Remarks.

Some of the materials in this standard may be the subject of patent or patent applications, and their listing herein is not to be construed in any way as the granting of a license under such patent rights.